[填空题]
The Moon orbits the Earth such that the same side al76 tsz8(ms fka -i8qwrways faces tr:n2t/xjfo l ow(u3.g he Earth. Determine the ratio of the Moon’s spin angular momentum (about its own axis) to its orbital angular momentum. (In the latter case, trealu3r: oow(.jnx g/f 2tt the Moon as a particle orbiting the Earth.) $\times10^{ -6}$